Synopsis:
   set banner_expand [on|off|toggle]

Description:
   If this is ON, the value of set(4) banner will be evaluated every time
   it is displayed.

Practical:
   This is useful if you like to display the current time ($Z) in your
   banner.

Example:
   /set banner_expand ON
   /set banner $Z ***
   
   9:00PM *** CTCP PING from MrFoo detected

See Also:
   set(4) banner